Turbosmart Dual Port Blow Off Valve - 2008-2017 Subaru WRX STI
The Turbosmart Dual Port valve is a hybrid-type BOV offering three BOVs in one. The Dual Port can be configured to vent to the atmosphere, back into the air intake or both! Plumb Back system for quiet, road-compliant operation, Supersonic for the race track, or Dual Port for the best of both worlds. Features a twist top design to allow for quick fine tuning of the valve.